<template>
  <div class="login_container">
    <div class="login_box">
      <div class="avatar_box">
        <img src="../assets/logo.png" alt="" />
      </div>
      <!-- 登录表单区域 -->
      <el-form
        :model="loginForm"
        :rules="loginFormRules"
        ref="loginFormRef"
        class="login_form"
        label-width="0px"
      >
        <!-- 账号 -->
        <el-form-item prop="username">
          <el-input
            v-model="loginForm.username"
            prefix-icon="iconfont icon-user"
          ></el-input>
        </el-form-item>
        <!-- 密码 -->
        <el-form-item prop="password">
          <el-input
            v-model="loginForm.password"
            prefix-icon="iconfont icon-3702mima"
            type="password"
          ></el-input>
        </el-form-item>
        <!-- 按钮区域 -->
        <el-form-item class="btns">
          <el-button type="primary" @click="login">登录</el-button>
          <el-button type="info" @click="reset">重置</el-button>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>

<script>
export default {
  data() {
    return {
      loginForm: {
        username: "admin",
        password: "123456",
      },
      loginFormRules: {
        // 验证用户名是否合法
        username: [
          { required: true, message: "请输入登录名称", trigger: "blur" },
          { min: 3, max: 10, message: "长度在 3 到 10 个字符", trigger: "blur" },
        ],
        // 检验密码是否合法
        password: [
          { required: true, message: "请输入登录密码", trigger: "blur" },
          { min: 6, max: 15, message: "长度在 6 到 15 个字符", trigger: "blur" },
        ]
      },
    };
  },
  methods: {
    reset() {
        this.$refs.loginFormRef.resetFields()
    },
    login() {
        this.$refs.loginFormRef.validate(async valid => {
            if (!valid) return
            // console.log(valid);
            // post里面第一个参数是接口  第二个是参数
            const { data: res } = await this.$http.post("login", this.loginForm);
            if (res.meta.status !== 200) return this.$message.error('登录失败');
            // console.log("登录成功");
            this.$message.success('登录成功');
            // 1. 将登录成功之后的 token, 保存到客户端的 sessionStorage 中
            //   1.1 项目中除了登录之外的其他API接口，必须在登录之后才能访问
            //   1.2 token 只应在当前网站打开期间生效， 所以将 token 保存在 sessionStorage 中
            window.sessionStorage.setItem("token", res.data.token);
            // 2. 通过编程式导航跳转到后台主页，路由地址是 /home
            this.$router.push("/home")
        })
    }
  }
};
</script>

<style scoped>
.login_container {
  background-color: #2b4b6b;
  height: 100%;
}

.login_box {
  position: absolute;
  width: 450px;
  height: 300px;
  background-color: #fff;
  border-radius: 3px;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
}
.avatar_box {
  height: 130px;
  width: 130px;
  border: 1px solid #eee;
  border-radius: 50%;
  padding: 10px;
  box-shadow: 0 0 10px #ddd;
  position: absolute;
  left: 50%;
  transform: translate(-50%, -50%);
  background-color: #fff;
}
.avatar_box img {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  background-color: #eee;
}

.login_form {
  position: absolute;
  bottom: 0;
  width: 100%;
  padding: 0 20px;
  box-sizing: border-box;
}

.btns {
  display: flex;
  justify-content: flex-end;
}
</style>